Most Compact Power Electronic System
Off-the-shelf for Electro-Mobility


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SKAI® Benefits

The SKAI power electronic platform comprises highly integrated motor controllers which provide the ideal powertrain solution for mobile electric and hybrid applications. Power densities of up to 20 kVA / liter bring about notable size reductions compared with other existing standard motor controller products. The systems are designed to operate with supply voltages of 24V to 800V and with output power ratings of up to 300 kVA. The IGBT-based SKAI 2 HV motor controller operates on sintered, 100% solder-free 600V or 1200V power semiconductors and it features polypropylene film DC-link capacitors. The MOS-based SKAI 3 LV motor controller uses established SKiiP technology with a very low-inductance connection to the DC-link capacitors, driver electronics, current, voltage and temperature sensors. It is integrated into a waterproof IP66 enclosure. The compact motor controllers can withstand high vibration amplitudes of up to 10g rms. SKAIware motor control software adds to the system function and finishes off this tried-and-tested package for the SKAI 2 HV nicely. SEMIKRON provides engineering services to support customers with the integration of SKAI 2 HV motor controller systems. Other available services include, for instance, lifetime estimation, field application support, individual parameterization of motor control software, and others.

SKAI® Product Family


SKAI 2 HV comprises a versatile 3-phase AC/DC and DC/AC converter product platform designed for use in electrified vehicles. It covers key requirements such as high power density, exceptional ruggedness and automotive EMI compliance.

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SKAI 3 LV is the 3rd generation of industrial MOSFET inverters and constitutes the 7th generation of MOSFET inverter technology. The 3rd generation is a platform concept that offers standard design versions or can be customised to meet your needs.

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SKAI® Short Facts

  • Suitable for battery voltages 24V up to 800V
  • Sintered power semiconductors
  • EMI compliant
  • Off-the-shelf versions with gate driver interface, vector control software, automotive power connections

SKAI® Key Features

  • Compact integration in IP 67 enclosure
  • Voltage, current and temperature sensors
  • Gate driver with protection
  • IGBT/ MOSFET power semiconductors
  • Fully programmable digital signal processor
  • EMI filters
  • Versatile cooling system (liquid cooled, forced air cooled, base plate)
  • DC link capacitors
  • Motor control software

SKAI® Applications

The SKAI off-the-shelf power electronic building block family has been introduced to cover a broad range of vehicle electrification applications. Examples are electric drivetrains with standardized motor/generator flanges to fit or retrofit the drives easily into existing vehicle designs. These types of drivetrains have been developed for many vehicle types, i.e. buses, light trucks, agriculture and construction machinery as well as marine applications or cars.

SKAI® Product Range

Versatile SKAI 2 HV off-the-shelf versions are available. The SKAI 3 LV is available for supply voltages between 24V and 170V. Cooling methods are liquid, forced air cooling or baseplate. Various optional services also exists, such as end-of-line flashing of customer specific software, lifetime estimation based on application profile analysis, field application support, individual parameterization of motor control software and other services (on request).

SKAI® Systems

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